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出典:Wikipedia
出典:『Wikipedia』 (2011/07/09 16:53 UTC 版)
Debeaking, also called beak trimming is the partial removal of the beak of poultry, especially chickens and turkeys. Most commonly, the beak is shortened permanently, although regrowth can occur. The trimmed lower beak is somewhat longer than the upper beak. USA's UEP guidelines suggest that in egg laying strains of chickens, the length of the upper beak distal from the nostrils which remains following trimming, should be 2 to 3 mm. The term “debeaking” implies that the entire beak is removed during the trimming process, though in reality only half or less of the beak is removed.